sidey

(US, slang, chiefly, AAVE) Acting snobbish, arrogant, or superior; uppity; perceived to be trying to associate with a higher social class.

A Scottish dialectal variant of 'sideways', with the added '-ey-' giving it a slightly more emphatic, elongated quality. Used in Scottish English to describe lateral movement or positioning — going sideyways is moving to the side rather than forward or backward. While it looks like a quirky spelling, it's a genuine regional variant that captures the way the word is actually pronounced in parts of Scotland, where vowel elongation and extra syllables add color to everyday speech.

(AAVE, slang, intransitive) To show off; to strut.

(British, informal) Pretentious; posturing.